I have an Ultimo 4K and have installed the latest vuplus image. No matter what timezone setting I chose the clock would not be correct for British Summer Time. Looking into this I found that the Europe GMT choice in the setup create as symbolic link for /etc/localtime which points to a file which doesn't exist. i.e.
/usr/share/zoneinfo/Europe/Dublin. So the solution is to copy /usr/share/zoneinfo/GB to ../Europe/Dublin and reboot.
/usr/share/zoneinfo/Europe/Dublin. So the solution is to copy /usr/share/zoneinfo/GB to ../Europe/Dublin and reboot.